Lathe for turning irregular forms



(No Model.)

0.,KR 0MBR 8v F. RINKLEFF.

3 Sheets-Sheet 1 LATHE POR. TURNINGV IRRBGULAR FORMS.

Patented May 22,1883.

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i 3 Sheets-Sheet 2v. o. KROMBR & I'. RINKLEFF. LATHE POR TURNING IRRBGULAR FORMS. No. 278,025.

Patented May 22,1883.

(No Model.)

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3 sheets-sheen 3. o. KImMBREl P. RINKLEPP. LATHE POR- TURNING IRREGULAR FORMS. No. 278,025.

Patented May 22,1883.

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NiTED STATES PATENT Ormea.

OTTO KROMER AND FRANKv RINKLEFF, OF SANDUSKY, OHIO.

LATHE FOR TURNING IRREGULAR FORMS.

`SPECIFICATION forming part of Letters Patent No. 27,025, dated May 22, 1883. I Application iiled September 1G, 18M. (No model.)

The nature of our invention relates to cer` tain new and useful improvements in that class of lathes employed for turning irregular forms, our improvement being especially designed with reference to perfecting a more perfect device for turning wagon-spokes.

In the ordinary construction of spoke-lathes, wherein the spoke isfplaced between centers and is advanced to or drawn away from a cutseY ter in conformity with the shape of a pattern, various devices are in use for automatically changing the velocity of the revolving spoke and pattern to a slower motion while cutting the shoulder of the spoke'. The most improved arrangement -is a belt-tightening device which automatically loosens the belt on the fast puiley and tightens it on the slow one; but this arrangement has two great defects. One is that the workman', in order to reset his belttightener after one spoke is finished, is required to lift quite a heavy weight, and the general Mobjection to ever having a loose belt on the live pulleys when the machine is requiredto come to a dead stop after the spoke is finished. In our improved machine we keep tight belts on both the slow and fast pulleys all the time, and communicate the motion from either one by means of a clutch which is automatically thrown into or out of gear with ,either or both pulleys, as required for the performance of the work. We have also improved upon the devices for resetting the parts for each recurring operation, making them also handier by placing them in more convenient reach for the operator. The combination ofthe devices adopted by us greatly reduces the work ofthe attend-` ant operator, as the machine works perfectly automatically and the resetting requires a less expenditure of time and strength.

f Figure lis a perspective of our improved parts, showing them in connection with the KROMER and rest of the machine. Fig. 2 is a similar view, the parts being shown as they stand at the end of an operation. Fig. 3 is a plan view of the same. Fig. 4 is an inside elevation of the front portion 0f our machine. section.

In the drawings, A is the upper front por-v Fig. 5 is a transverse y tion of the bed of the machine, heilig a part `of the frame.

B is the swinging carriage.

O is the sliding carriage.

D is the pulley'which rotates the pattern and spoke.

E is the pulley from which the pulley D derives its motion, being connected therewith by a belt.

F is the counter-shalt on which the pulley E revolves.

G is the main driving-shaft which rotates the pulleys HsI. K and ll are two other pulley's on the counter-shaft F. The pulleys K and H are connected by a belt, and give slow lnotion, while the pulleys I and L., also connected by a belt, give the fastmotion to the counter-shaft F by the operation of the devices 1 hereinafter described, and which contain the substance of our invention. The pulleys L and K revolveloosely upon the shaft F, and between these pulleys is placed the double clutch M, which is adapted to be shifted upon the shaft F on a spline, so as to engage either with the clutch-member a. on the `pulley L, or with the clutch-member b on the pulley K, or be out of engagement with either one.

N is a lever pivoted to the frame ofthe inachine at c. Its inner end is forked and embraces the double clutch M without preventing its free rotation. The forward end of this lever engages in the oblique slot d ot the vertical bar 0. This bar O has a vertical play, and it passes at its lower end through a slot, c, in the part A of the frame, andnear its upper end through a slot, j', in the part A of the frame.

notches, g, by which the bar may be prevented from dropping through the 'slot j', as

2, wherein the upper one of the shown in Fig.

be engaged upon the This bar O is also provided with twov IOO lever P, which partly lies on top of the frame A and partly below, as shown in Fig. 4, having for a fulcruin the short shafti, pivoted in the frame A. Y

7c is a pin adjustably secured to the lever P.

Q is a camdetent secured to the sliding carriage in such position as to impinge, in the for- -ward motion of said carriage, against the pin k, andthereby impart a rocking movement to the lever P. Said movement actuating the bar 0, will discngage its notch and allow it to drop the whole length ofthe slot hf. It is a curved bar pivoted at its upper end at Ii as shown in Fig. 3, to thel swinging carriage. Its lower end is stepped into one end of the lever S, as shown in Fig. 4, pivoted at m to a convenient part of the frame. The free end of lthe lever Sis adapted to engage with the pin n, near the lower end'of the bar O, as shown in Fig. 4. The curved bar R comes into action whenever the swinging carriage falls forward, which it does whenever the spoke is finished. This vmovement depresses the curved bar and actuates the'lever S, which, b v reason of its engagement with the pin a, lifts the bar O.

Tyis a rockshaftjournaled to the frame A of the machine. It is provided at one end with the crank-lever o, which is put in the most convenient position for the operator,and at the other end with the crank-lever p, which engages into a loop, q, upon the side of the bar O. A spring, k', is secured to the frame A, back of the lever It). Its tension forces the bar 0,"through the medium of the lever'P, toI

keep its notches q in engagement with the slot f. The cam-detent Q impinges against the pin 7.a, and thereby turns or swings the lever P around its pivot t' and releases the bar 0 from engagement with its notch, and allows it .to drop the full length of the oblique slot d, changing thereby the clutch M from the fast pnlleyK to the slowpulley L, which nowtransmits its motion until the operation ot' turning is tinished, when the swinging frame B, being released in the usual manner, swings forward,

and the bar It, following this movement, depresses the inner end ofthe leverS and forces the other end up, which, heilig engaged by the pin fn,will also litt the barOa certain distance up, which is so adjusted as to amount to onehalf ot' the length of the slot c, thereby holding the lever N in proper position to hold the clutch M disengaged from either pulley. In other words, this brings the shaft F to a dead stop, thus allowing the operator to remove the linished spoke and put in a new one. Then the operator, by means of the crank-lever 0, throws the bar O bach to-its elevated position, and work can be commenced on the new spoke as soon as the swinging frame B is pushed back into position, which, on thc machine shown in the drawings, is done by the operator lifting the counter-weight U.

The feed is arranged as follows:

V is a shaft journaled across a suitable extension, A2,v of the frame.

clutch Wgwhicb slides on a spline on the shaft V, is embraced by the forked end of the lever X, pivoted ou top of the frame A at s. Its other end engages in the end of the sliding bar Y, which is held and guided in proper journals t t, and its inner end is provided with the cross-head u.

Zis a vertical bar, with its lower end pivoted to the arm u', which bears the counterweight U. This bar Z is free to raise and fall with the counter-weight u, except when forcibly prevented therefrom by means of the en-v gagement of its shoulder u on top of the crosshead u.

' yw is a detent attached to the forward end of the shifting` carriage C.

In practice the parts are so adjusted that at the completion of the. work the detent tu impiuges against the cross-head '1t and shoves it forward, releasing the shoulder c from its engagement thereon, and allowing the bar Z to drop, the latter being forced thereto by its connection with the arm U of the counter-weight U, which is sufficiently heavy to counterbalance all the 'opposing weight and swing the .carriage B forward in the usual manner. This same movement, by means of the connection described, parts 'the clutch W from its engagement, and the shaft V is now free to revolve in an opposite direction,being actuated thereto by the usual counter-weight, (not showin) which retrogrades the sliding carriage. To bring the swinging carriage again into proper position for operation the counter-weight U must be raised until the shoulder a ofthe vertical bar Zengages again on top of the crosshead u, and to make this engagement positive a coil-spring, w', is arranged upon the sliding bar Y. In order, when circumstances ren- Ioo IIO

der such necessary, to suspend the operation l of the machine instantly, a hand-lever, y, is pivoted to the frame A and connected to the cross-head u. By turning this lever forward it will disengage the cross-head from its engagement with thevertical bar Z, thereby allowing the carriage B to swing forward and away from the cutters. nIt will be seen that the action of the vertical bar Z has no further bearing upon the action of the feeding device than to make the operation of the clutch W perfectly positive.

What we claim as our invention is l. The double clutch M, wheels K L, and i lever N, combined with the bar O, having linclined slot d, the lever P, fulcrumcd at t', and the sliding carriage C, and means for operating said levers, as and for the purposes set forth.

2. In a lathe for turning irregular forms, and

in combination with the mechanical devices described for automatically operatin g the clutch M, the lever N, bar O, provided with notches g, lever P, provided with adjustable pin la, spring 7a', and the sliding carriage C, having cam-detent Q, the parts being constructed, combined, and operating substantially as and for the purposes described.

3. In a lathe for turning irregular forms, the combination of the counter-shaft Fand the two sets of pulleys I L and K H with the clutch M, sliding carriage (Land connections where by the saidcarriage G, through its connections.

with said clutch, serves to automatically impart a slow or a fast motion, as occasion requires, substantially as set forth.

4; In a lathe for turning irregular forms. the rock-shaft T, attached at or near the front ofthe frame A, and provided with the crankhandle o and crank-leverp, and in combination therewith the vertical sliding bar O, lever N, and clutch M, whereby the operator may conveniently elevate thebarO after the new blank has been placed in the machine, and again automatically start the machine, substantially as and for the purposes specified.

5. In a lathe for turning-irregular forms, the

arm R, pivotally attached to the swinging frame,the lever S, and bar O, having pin n, coinbined with the clutch M and leverN, whereby the bar O is automatically thrown one-halfits stroke to hold the clutch out of mesh with both pulleys Land K, substantially as set forth.

6. In combination with the carriage G,hav ing detent w, the shaft V, and counter-weight clutch W, elbow-lever S, arm Y, springen', and cross-head u, whereby the carriage C, at the end ofits traverse in one direction, throws the Witnesses W. F. CONVERSE, AUGUST KuLoTz. 

